Not sure why but when I change this:

temp.df[,month]<-month
temp.df[,year]<-year

to this:
temp.df[,2]<-month
temp.df[,1]<-year

it seems to work.

On Sun, Mar 30, 2014 at 6:01 PM, Bill <william108@gmail.com> wrote:

> temp.df[,month]<-month
> temp.df[,year]<-year
>

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